list_b = [
    [10,14,9,15],
    [7,4,8,10],
    [6,8,4,9],
    [8,51,10,23]
]
for i in range(4):
    for j in range(4):
        for k in range(1,4):
            if list_b[i][j] > list_b[i][k] and list_b[i][j] < list_b[k][j] :
                print(f'靶点为第{i+1}行，第{j+1}列的{list_b[i][j]}')

